iPadOS 12.3 (build 16F5155a) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2019-05-07T17:03:43Z. The update package is 370.63 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 96c5636b9fb01155d62fb9b2ca5ca483876d3869.zip.